Viterbo Climate by Month
Viterbo, Lazio, Italy
Hot summers and cool winters, with little rain.
Viterbo has hot summers and cool winters, with little rain. Afternoon highs range from 49°F (9°C) in January to 88°F (31°C) in August, and January nights average 37°F (3°C). It gets only 12 in (294 mm) of rain a year.
- Warmest month
- 88°F(31°C)
- Average high, August
- Coldest nights
- 37°F(3°C)
- Average low, January
- Rain per year
- 12 in(294 mm)
- No clear rainy season
- Humidity
- 66%
- Sunniest: July
Best and worst months in Viterbo
Best for weatherMay and September are the best time for weather in Viterbo: highs near 75°F (24°C) and about 1.0 in (26 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; January is the coldest, with highs of only 49°F (9°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Viterbo weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 49°F(9°C) | 37°F(3°C) | 0.9 in(22 mm) | 76% | 1.8 |
| FebFebruary | 51°F(11°C) | 37°F(3°C) | 0.9 in(24 mm) | 72% | 2.5 |
| MarMarch | 57°F(14°C) | 42°F(5°C) | 0.8 in(21 mm) | 67% | 3.6 |
| AprApril | 64°F(18°C) | 45°F(7°C) | 0.9 in(24 mm) | 69% | 4.8 |
| MayMayBest | 73°F(23°C) | 53°F(12°C) | 1.0 in(25 mm) | 66% | 6.1 |
| JunJune | 81°F(27°C) | 61°F(16°C) | 0.7 in(18 mm) | 58% | 6.8 |
| JulJuly | 88°F(31°C) | 65°F(18°C) | 0.4 in(10 mm) | 55% | 7.1 |
| AugAugust | 88°F(31°C) | 66°F(19°C) | 0.5 in(12 mm) | 54% | 6.3 |
| SepSeptemberBest | 78°F(25°C) | 59°F(15°C) | 1.1 in(27 mm) | 63% | 4.5 |
| OctOctober | 68°F(20°C) | 53°F(11°C) | 1.5 in(38 mm) | 68% | 3.1 |
| NovNovember | 57°F(14°C) | 45°F(7°C) | 1.7 in(42 mm) | 78% | 1.8 |
| DecDecember | 50°F(10°C) | 39°F(4°C) | 1.2 in(31 mm) | 70% | 1.4 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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